Refrigerating apparatus



ug- 1 o. MfsuMMERs REFRIGERATING' APPARATUS Original Filed Jan. 51, 1929 M x/4 ATTORN EYS Patented Aug. 29, 1933 UNITED STATES BEFRIGERATING APPARATUS Otto M. Summers, Dayton, Ohio, assignor to Frigidaire Corporation, Dayton, Ohio, a corporation of Ohio Continuation of application Serial No. 336,444,

January 31, 1929.

This application February 28, 1931. Serial No. 519,055

9 Claims.

This application is a continuation of my copending application for refrigerating apparatus, Serial No. 336,444, filed January 31, 1929.

This invention relates to refrigerating apparatus and more particularly to the power transmission means between the motor and compressor of said apparatus.

An object of the invention is to provide an improved motor compressor unit wherein the belt will be automatically maintained at a substantially even driving tension at all times.

Another object is to insulate the motor from the unit and/or cabinet so that the motor noises will not be transmitted to the unit and/or cabinet.

A further object is to provide a guide means for a resiliently mounted motor to guide the direction of movement of said motor.

Another object is to provide an improved method of manufacturing the resilient guide pulleys of the motor mounting means.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawing, wherein a preferred form of the present invention is clearly shown.

In the drawing:

Fig. 1 is a top view of a refrigerant liquefying unit embodying one form of the invention;

Fig. 2 is a section along the line 2--2 of Fig. 1;

Fig. 3 is a section along,;.,the line 3-3 of Fig. 2; and

Fig. 4 is a section of one of the rollers shown in Fig. 3.

One of the problems in household mechanical refrigerating apparatus is to maintain the apparatus quiet in operation. Where a belt drive is used between the motor and compressor in such apparatus, the stretch and wear that occurs after a certain period of use not only tends to decrease the efliciency of the transmission of power from the motor to the compressor, but

also tends to increase the noise due to the op-- eration of the motor and compressor. An object of this invention is therefore to automatically take up any wear or stretch of the belt and to maintain the belt at an even driving tension at all times. The attaining of these objects is disclosed in the application of one form of the invention to the refrigerating apparatus in Fig. 1.

Referring to the drawing there is shown a platform 26 upon which a compressor 14 is mounted. The compressor is provided with a combined flywheel, pulley and fan 13. The compressor is driven by a motor which is provided with a combined pulley and fan 11 and con nected to the compressor by a V-belt 12 which surrounds the pulley portion of the combined pulley and fan 11 and the pulley 13 driving the compressor 14. Refrigerant is compressed by the compressor 14 and forwarded through the conduit 15 to the condenser 16 also mounted on the platform 26 where the refrigerant is condensed. The condensed refrigerant is collected in a receiver and forwarded therefrom to an evaporator or cooling unit of any suitable type where the condensed refrigerant is evaporated and returned to the compressor 14 through a return conduit which is connected to the compressor at the connection 41.

The motor 10 is provided with a base 23 having short inclined tracks 33 beneath either side. These inclined tracks rest upon a pair of grooved metal tired rubber rollers 28 which are supported on the shafts 27 mounted on the base 26. These rubber rollers are provided with a hard rubber hub 30 having a central bore 29 to receive the shaft 27. A soft rubber portion 31 surrounding the hub 30 and a grooved metal tire 32 surrounds this soft rubber portion.

' A novel method is used in making this roller. An unvulcanized hard rubber sleeve having a bore the size of the bore 29 is taken and soft unvulcanized rubber material is placed about this sleeve. The metal tire 32 is placed about this soft unvulcanized rubber. The unvulcanized hard rubber end faces 35 are placed against the end of the sleeve and the whole assembly is placed into a mold and vulcanized together so that the sleeve becomes vulcanized to the end.

faces 35 providing a unitary hub and the soft rubber vulcanized to the hub and the tire making a unitary roller.

A guide rod 34 is welded to one side of the motor base 23 which has an edge curled partially about the rod to properly hold it and make a good fit. This rod extends toward the compressor parallel to an edge of the platform and perpendicular to the axis of the motor. The guide rod 34, guides the inclined tracks 33 in their up and down movement over the rollers 28. A rubber spool 37 surrounds the far end of the guide rod 34 and is attached to the platform 26 by the clamp 36. A coil spring 38 is mounted between a collar 39 fixed to the guide rod and the rubber spool 37 to resiliently urge the motor away from the compressor and also to hold the motor and the inclined tracks 33 in their proper place on the rollers 28. The inclined tracks 33 The motor is insulated from the platform- 10 by the rubber rollers 28 and the rubber spool 37 which surrounds the guide rod and prevents any vibration being transmitted therethrough to the platform 26 through the clamp 36. If the belt should stretch, the motor 10 will merely \move further down the incline and the tension will remain very nearly the same. The spring 38 aids the inclined track arrangement in providing suflicient tension for the belt.

203 tion as herein disclosed, constitutes a preferred .form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

a 1. In a motor-compressor unit, a driving member, a driven member, a support for said members, one or more rubber rollers, an inclined track, said rubber rollers and said inclined track cooperating to adjustably support one of said members upon said support, and means to maintain the bodily movement of said last mentioned member in substantially a straight line comprising a guide rod attached to said member and a guide spool attached to said support.

2. In a motor-compressor unit, a driving member, a driven member, belt means connecting said members, one of said members being yieldingly mounted, a guide rod limitingthe direction of yield of said member, and a yielding element 9 supporting the free end of said guide rod.

3. In a motor-compressor unit, a driving member, a driven member, belt means connecting said members, a guide element attached to one of said.

yield of said member, a yielding element supporting and'guiding the free end of said guide rod, and resilient means for limiting the movement of said guide rod.

5. In a motor-compressor unit, a driving mem.-' her, a driven member, belt means connecting said members, one of said members being yieldingly mounted, a guide rod for guiding the-direction of yield of said member, a yielding element supporting and guiding the free end of said guide rod, and means for limiting the movement of said last mentioned member in one direction and resilient means for limiting the movement 01 the last mentioned member in the opposite direction.

6. In a motor-compressor unit, a driving mem ber, a driven member, belt means connecting said members, a guide element attached to one of said members, said last mentioned member being While the form of embodiment of the invenyieldingly mounted, a rubber guide means for the free end of said guide element, and means cooperating with said guide for limiting the movement of said guide element.

'7. In a motor-compressor unit, a driving member, a driven'member, belt means-connecting said members, one of said members being movably mounted upon an inclined plane for tensioning the belt means, a guide element connected to said last mentioned member for guiding its movement upon the inclined plane, means for guiding said guide element and resilient means cooperating with said guide element for applying an additional tension upon the belt means.

8. In a motor compressor unit, a driving member, a driven member, belt means connecting said members, one of said members being mounted to 1 slide down an inclined plane to thereby maintain the belt means taut, and a guide rod connected to said last mentioned member for guiding said last mentioned member in its movement upon said inclined plane.

9. In a. motor compressor unit, a driving member, a driven member, belt means connecting said members, one of said members being mounted to move down an inclined plane to therebymaintain the belt means taut, a guide rod connected to said last mentioned member for guiding said member and a yielding element for supporting the free end of said guide rod.

o'I'I'o M. sum/mas. 

